/rv
Respawn a vehicle, a group of vehicles (eg vehicles at the /grc minigame) or all vehicles
In the game
Usage: /respawnvehicle <VehicleNumber>
Respawns the specified vehicle which returns it back to its default location.
If any player is in the vehicle when it is respawned they will be ejected.
Note: If 1777 is specified the train and trams will be respawned.
Note: If 0 is specified all static vehicles will be respawned.
The shortcut for this command is: /rv
What it does
Not explained in detail yet.
Wiki